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All-Microstrip Design of Three Multiplexed Antennas and LNA for UWB Systems
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0003-2117-1178
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0002-4136-0817
Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
2006 (Engelska)Ingår i: Asia-Pacific Microwave Conf., December 2006, 2006, s. 1106-1109Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

An ultra-wideband (UWB) 3.1-4.8 GHz radio front-end consisting of three frequency multiplexed antennas and a low-noise amplifier (LNA) is presented in this paper. Using one antenna for each sub-band and an LNA designed for maximum-flat power gain provides equal performance within the entire frequency band. Frequency multiplexing is used to combine the antennas for multi-band UWB. The LNA is optimized for wideband operation and minimum noise figure. The LNA design employs dual-section input and output matching networks. The antennas, the frequency multiplexing network, the matching networks and the bias circuit of the LNA are all implemented using microstrip lines.

Ort, förlag, år, upplaga, sidor
2006. s. 1106-1109
Nyckelord [en]
antenna arrays, frequency division multiplexing, low noise amplifiers, microstrip antennas, microwave amplifiers, microwave antennas, ultra wideband antennas, wideband amplifiers, LNA, UWB systems, bias circuit, dual-section matching networks, frequency 3.1 GHz to 4.8 GHz, frequency multiplexed antennas, microstrip design, microstrip lines, multiband UWB, ultra-wideband radio front-end
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:liu:diva-12798DOI: 10.1109/APMC.2006.4429602ISBN: 978-4-902339-08-6 (tryckt)OAI: oai:DiVA.org:liu-12798DiVA, id: diva2:17075
Tillgänglig från: 2008-01-07 Skapad: 2008-01-07 Senast uppdaterad: 2019-06-17Bibliografiskt granskad
Ingår i avhandling
1. Ultra-wideband Antenna and Radio Front-end Systems
Öppna denna publikation i ny flik eller fönster >>Ultra-wideband Antenna and Radio Front-end Systems
2008 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The number of wireless communication applications increase steadily, leading to the competition for currently allocated frequency bands. Pressure on authorities around the world to permit communications in higher and wider frequency ranges to achieve higher wireless capacity than those existed in the past has resulted in several new specifications. The federal communication commission (FCC) in USA has unleashed the band 3.1-10.6 GHz for ultra-wideband radio (UWB) communications. The release has triggered a worldwide interest for UWB. Other regulatory instances throughout the world have issued use of UWB techniques as well. Capacity issues in form of data rate and latency have always been a bottleneck for broadened wireless-communication usages. New communication systems like UWB require larger bandwidth than what is normally utilized with traditional antenna techniques. The interest for compact consumer electronics is growing in the meantime, creating a demand on efficient and low profile antennas which can be integrated on a printed circuit board. In this thesis, some methods to extend the bandwidth and other antenna parameters associated with wideband usages are studied. Furthermore, methods on how to enhance the performance when one antenna-element is not enough are studied as well.

The principle of antenna parallelism is demonstrated using both microstrip patch antennas and inverted-F antennas. Several techniques to combine the antennas in parallel have been evaluated. Firstly, a solution using power-splitters to form sub-arrays that covers one 500-MHz multi-band orthogonal frequency division multiplexing (OFDM) UWB is shown in Paper I. It is then proposed that the sub-bands are selected with a switching network. A more convenient method is to use the later developed frequency multiplexing technique as described in Paper V and VIII. Using the frequency multiplexing technique, selective connection of any number of antennas to a common junction is possible. The characteristic impedance is chosen freely, typically using a 50-Ω feed-line. Secondly, in Paper VIII a frequency-triplexed inverted-F antenna system is investigated to cover the Mode 1 multi-band UWB bandwidth 3.1-4.8 GHz. The antenna system is composed of three inverted-F antennas and a frequency triplexer including three 5th order bandpass filters. In Paper VI a printed circuit board integrated-triplexer for multi-band UWB radio is presented. The triplexer utilizes a microstrip network and three combined broadside- and edge-coupled filters. The triplexer is fully integrated in a four metal-layer printed circuit board with the minimum requirement on process tolerances. Furthermore, the system is built completely with distributed microstrips, i.e., no discrete components. Using the proposed solution an equal performance between the sub-bands is obtained. Finally suitable monopoles and dipoles are discussed and evaluated for UWB. In Paper X circular monopole and dipole antennas for UWB utilizing the flex-rigid concept are proposed. The flex-rigid concept combines flexible polyimide materials with the regular printed circuit board material. The antennas are placed entirely on the flexible part while the antenna ground plane and the dipole antenna balun are placed in the rigid part.

Ort, förlag, år, upplaga, sidor
Institutionen för teknik och naturvetenskap, 2008. s. 88
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1146
Nyckelord
Wireless communication, ultra-wideband, radio communication, UWB bandwidth, antenna parallelism
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:liu:diva-10338 (URN)978-91-85895-36-6 (ISBN)
Disputation
2008-02-29, K2, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:00 (Engelska)
Opponent
Tillgänglig från: 2008-01-07 Skapad: 2008-01-07 Senast uppdaterad: 2020-03-24
2. Ultra-Wideband Low-Noise Amplifier andSix-Port Transceiver for High Speed DataTransmission
Öppna denna publikation i ny flik eller fönster >>Ultra-Wideband Low-Noise Amplifier andSix-Port Transceiver for High Speed DataTransmission
2010 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Today’s data rates in wired networks can reach 100 Gbit/s using optical fiber while data rates in wireless networks are much lower - tens of Mbit/s for 3G mobile communication and 480 Mbit/s for ultra-wideband (UWB) short range wireless communications. This difference in data rates can mainly be explained by the limited allowed frequency spectrum, the nature of the radio signal and the high requirements imposed on all hardware designed for high speed and wideband wireless communications. However, the demand on wireless commercial applications at competitive costs is growing. The first step in regulations allowing higher data rates for wireless communications was taken in 2002, when the Federal Communication Commission (FCC) in USA released unlicensed the 3.1-10.6 GHz frequency band restricting only the power level (maximum mean equivalent isotropic radiated power density of a UWB transmitter is -41.3 dBm/MHz) in the band 3.1-10.6 GHz. But Europe, Japan and recently China have put additional restrictions on the 3.1-4.8 GHz band. The restrictions address the problems that have raised from the coexistence and colocation of the UWB systems with other narrowband wireless systems. Thus, the 6-9 GHz band combined with an increased modulation order scheme is of large interest.

Operating at higher frequency and wider bandwidth than today’s communication technologies, with the general task of maximizing the wireless data rate while keeping the power consumption low, requires new communication system solutions and new circuit design approaches. These new solutions also require understanding of many multi-disciplinary areas which until the recent past were not directly related: from classic analog circuit design to microwave design, from modulation techniques to radio system architecture.

In this thesis, new design techniques for wide bandwidth circuits above 3 GHz are presented. After focusing on ultra-wideband low-noise amplifier (UWB LNA) design for low-power and low-cost applications, the practical implementation and measurement of a 3.1-4.8 GHz UWB LNA is addressed. Passive distributed components of microstrip transmission lines are intensively used and their contribution to the UWB LNA performance is studied. In order to verify the design methodology while extending it to the UWB radio front-end,

the UWB LNA is integrated on the same substrate with a pre-selecting filter with the frequency multiplexing function. In this way, the concept of frequencytriplexed UWB front-end is demonstrated for the Mode 1 multi-band UWB bandwidth 3.1-4.8 GHz. Using the proposed receiver front-end topology, better receiver sensitivity and selective operation can be achieved.

The later part of the thesis investigates ultra-wideband 6-9 GHz receiver and transmitter front-end topologies for Gbit/s data rates and low power consumption. To capture the advantages offered by distributed passive components, both the transmitter and receiver use the six-port correlator as the core of a passive mixer. Modelling and design of the 6-9 GHz UWB front-end transceiver include different receiver topologies and different modulation schemes. Finally, the 7.5 GHz UWB transceiver front-end is implemented and evaluated. Measurement results confirm the large potential of the six-port UWB front-end to achieve multiple Gbit/s data rates. This may open for future solutions to meet the continuous challenge of modern communication systems: higher data rates at low power consumption and low cost.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2010. s. 82
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1295
Nationell ämneskategori
Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-52954 (URN)978-91-7393-463-3 (ISBN)
Disputation
2010-02-12, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2010-01-26 Skapad: 2010-01-14 Senast uppdaterad: 2020-02-19Bibliografiskt granskad
3. Low-Noise Amplifier Design for Ultra-Wideband Systems
Öppna denna publikation i ny flik eller fönster >>Low-Noise Amplifier Design for Ultra-Wideband Systems
2006 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The low-noise amplifier (LNA) remains a critical block in every receiver front-end. As the development of the widcband, low-power and low-cost wireless systems continues, new LNA topologies and design methodologies have become one of the most interesting challenges in the field of radio frequency system design. Optimally, wideband LNA design methodologies should provide improved receiver sensitivity and thus accurate low-level signal processing. The LNA design must handle trade-offs among LNA topology selection, wideband matching for low noise figure, flat power gain and wideband bias aspects. Another key factor of the wideband radio front-end design refers to the antenna-LNA eo-design. Any loss that occurs before the LNA in the system will substantially degrade the overall receiver sensitivity. In order to reduce losses and thus minimize the noise figure of the front-end, the LNA and the antenna or antenna-system should be designed simultaneously.

The main focus of this thesis has been LNA design for ultra-wideband (UWB) applications. Firstly, an overview of the design techniques for wideband matching networks is given. Then, the way in which some classical single-stage LNA topologies are adapted to UWB specifications is analyzed. To verify the wideband amplifier design principles, both a narrowband LNA for 5.25 GHz and a UWB LNA for 3-5 GHz based on microstrip matching networks were designed, manufactured, and measured. Advanced design techniques, for example electromagnetic simulations of the entire layout of the LNA module were utilized. Optimization techniques and statistical analyses were also used in the design flow. Moreover, a co-design of an antenna-UWB LNA front-end was performed for the minimum noise figure and maximum flat power gain within the entire frequency band. Finally, UWB bias networks implemented with different microstrip elements were studied. It has been shown that, without accurate high-frequency component models and without including highfrequency electromagnetic coupling and component parasitics, LNA and particularly UWB LNA design can result in large errors. A good designapproach has large potential to improve the performance and manufacturing yield of LNAs, especially UWB LNAs.

Ort, förlag, år, upplaga, sidor
Linköping: Linköpings universitet, 2006. s. 85
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1281
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
urn:nbn:se:liu:diva-44987 (URN)LIU-TEK-LIC:62 (ISRN)79038 (Lokalt ID)91-85643-48-3 (ISBN)79038 (Arkivnummer)79038 (OAI)
Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2023-02-15

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Serban (Craciunescu), AdrianaKarlsson, MagnusGong, Shaofang

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